webpack.config.js

const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const webpack = require('webpack');

module.exports = {
  entry: './src/index.js',
  output: {
    filename: 'app.bundle.js',
    path: path.join(__dirname, 'build'),
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          'style-loader',
          'css-loader',
        ],
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: [
          {
            // Using file-loader for these files
            loader: 'file-loader',

            // In options we can set different things like format
            // and directory to save
            options: {
              outputPath: 'images',
            },
          },
        ],
      },
      {
        // Apply rule for fonts files
        test: /\.(woff|woff2|ttf|otf|eot)$/,
        use: [
          {
            // Using file-loader too
            loader: 'file-loader',
            options: {
              outputPath: 'fonts',
            },
          },
        ],
      },
      {
        test: /\.js$/,
        include: path.resolve(__dirname, 'src/'),
        exclude: /(node_modules)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
          },
        },
      },
    ],
  },
  plugins: [
    new CopyWebpackPlugin({
      patterns: [
        {
          from: path.resolve(__dirname, 'src', 'index.html'),
          to: path.resolve(__dirname, 'build')
        },
        {
          from: path.resolve(__dirname, 'src/assets', '**', '*'),
          to: path.resolve(__dirname, 'build')
        }
      ],
    }),
    new webpack.DefinePlugin({
      'typeof CANVAS_RENDERER': JSON.stringify(true),
      'typeof WEBGL_RENDERER': JSON.stringify(true)
    })
  ]
};